Metering Issue code K11 coil pack engine

The garage has read the eml code & the garage said I have a metering issue on my coil pack engine K11 Micra 2000. the car keeps going into limp mode but when the orange light comes on it drives better.
The lambda & MAF have been changed & the car still doesn’t feel quite right & doesnt like going up hill, there is quite a drop in power. I had an aston-martin MAF fitted £100 ish not a cheap one!
What else could perk this car up please? Thank you, Sandra